/Engine/Source/Runtime/Engine/Public/ReferenceSkeleton.h
This contains Reference-skeleton related info Bone transform is saved as FTransform array
struct FMeshBoneInfo
FString
ExportName
Name used for export (this should be exact asFNamemay mess with case)
FName
Name
Bone's name.
int32
ParentIndex
INDEX_NONE if this is the root bone.